Blender 2.83 Cycles Not Rendering New Objects
From a similar question on SE I found the solution. The VSE has a previous image that is over riding the render result....
Why is my image sequence render using an old version of my animation?
I solved my problem by unchecking &quot;sequencer&quot; in the &quot;post processing&quot; tab.
Alternatively I could remove the existing images in the VSE